Hex socket head cap screw(TKS(Tokosha(Coarse Steel Zinc plated(Silver) 12 X 30 Pitch 1.75

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This is a bolt with a cylindrical head featuring a hexagonal socket.
Tightening is performed using a hex key (Allen wrench). Although classified as a bolt, it is most commonly used without a mating nut.
It is also known as a cap screw or socket screw.
Spanners and wrenches with jaws used to tighten hex bolts require clearance space around the work area, whereas a hex key requires no such clearance.
As a result, the use of hex socket head cap screws enables work in confined spaces and contributes to the miniaturization of machinery.
Their appearance has also led to increasing use in design-oriented applications.

• Hex socket head cap screw TKS Tokosha Coarse pitch
• Nominal diameter (d) M12
• Length under head (ℓ) 30.0
• Pitch (P) 1.75
• Head diameter (dk) Max(1) Nominal 18 Max(2) 18.27 Min 17.73
• Neck diameter (da) Max 13.7
• Body diameter (ds) Max Nominal 12 Min 11.73
• Head height (k) Max Nominal 12 Min 11.57
• Neck fillet (r) Min 0.6
• Hex socket width across flats (s) Nominal 10 Max 10.175 Min 10.025
• Hex socket depth (t) Min 6
• Head chamfer (v) Max 1.2
• ℓ dimension full thread range 50
• *Max(1) Maximum diameter without knurling Max(2) Maximum diameter with knurling